.service {
    height: 170px;
    margin-top: 14px;
    margin-bottom: 26px;
}

.service-sub {
    width: 234px;
    height: 170px;
    background-color: #5f5750;
    padding: 3px;
    margin-right: 14px;
}

.service-sub a {
    width: 76px;
    height: 82px;
    float: left;
    font-size: 12px;
    color: #ccc;
    text-align: center;
    padding-top: 10px;
    position: relative;
}

.service-sub a:hover {
    color: #fff;
}

.service-sub i {
    display: block;
}

.service-sub .iconfont {
    font-size: 26px;
}

.service-sub a::before {
    content: "";
    position: absolute;
    width: 1px;
    height: 70px;
    background-color: #665e57;
    left: 0;
    top: 6px;
}

.service-sub a::after {
    content: "";
    position: absolute;
    width: 64px;
    height: 1px;
    background-color: #665e57;
    left: 6px;
    bottom: 0;
}
.service-sub a:nth-child(3n+1)::before{
    content: none;
}
.service-sub a:nth-child(n+4)::after{
    content: none;
}

.service-banner a {
    width: 316px;
    height: 170px;
    margin-right: 15px;
}

.service-banner a:last-child {
    margin-right: 0;
}

.service-banner img {
    width: 100%;
    height: 100%;
}